Vintage Hamilton Accumatic A-504

The Hamilton Accumatic A-504 (introduced in 1965) is an exceptionally rare, one-year-only asymmetric automatic watch. To build it, Hamilton famously repurposed leftover stainless steel case stock from their earlier electric Regulus model, outfitting them with a reliable Swiss 17-jewel Caliber 689 automatic movement instead. Because it was produced only until surplus parts ran out, it is highly sought after by collectors.

Hamilton: Producing its first pocket watches in Lancaster, Pennsylvania in 1892, Hamilton is one of the most recognizable names in American watchmaking. Although production moved to Switzerland in 1969, the brand’s American-made catalog remains extensive and highly regarded. With strong ties to military history and pop culture, Hamilton continues to offer both well-made modern watches and a deep archive of desirable vintage pieces.